{
  "manageEntity": {
    "action": "Save",
    "entityId": "1280462253",
    "entityType": "Track",
    "nonce": "0x8119c86157b9af24d1cace90b3a5247bae68883fb72370a13871153eebec9c82",
    "signature": "0x497e934166326cb340f73798a4bacab76ce450ff86b412dfa47ae4e54e7fcc4b3d3e9971d77e1bec9e9feb91b176d045100bbf21c268e3af538e1633a8a8c6b31b",
    "signer": "0x4089d1751487aA665C895419F2578a6Cf33BE481",
    "userId": "728155533"
  }
}