{
  "manageEntity": {
    "action": "Save",
    "entityId": "702706524",
    "entityType": "Track",
    "nonce": "0x173f7fbf93a8f446e6b361fe469318c13eb9bf95e0d59ff0a8c107350f41eeb7",
    "signature": "0x0936f4534dffabfef1da1bb27b86917b40c0f89d0654a8a724bdef255642fe58626b8ccc2e8e72fda9004dc38cbe138857a4d6884935d056c872af5ee04577831c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}