{
  "manageEntity": {
    "action": "Save",
    "entityId": "74805032",
    "entityType": "Track",
    "nonce": "0x39052bae12bb256bbf0bf8f5f3206d64d9dc06dca122b157f248fe011d4db33d",
    "signature": "0xdc2ce5c8b9e30a1123f2b68c6f0bdb4f1a88ef6cb6abab6e31b2ade5a8ebba4171f2a4269db5652b63e7e790114354af651f274baf8184d194e43fd1617b8d391b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}