{
  "manageEntity": {
    "action": "Save",
    "entityId": "812876633",
    "entityType": "Track",
    "nonce": "0x8b73ddc92cd319dde9de7d9e90ce320e8e12a18e84687773558489afac06b668",
    "signature": "0xd0dd91a390e2316f7afffed4941deb8480d2b9d62292c0227d4ce396c287546c52914f70fd2374b4e6e2a443613a28ee2d77b3e0a27465246cc72e43b4f214911c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}