{
  "manageEntity": {
    "action": "Save",
    "entityId": "48104",
    "entityType": "Track",
    "nonce": "0x7c90ed4c8e2723fd2b5765be200f2bfc7b2b9d2a725421678140fb4a59e74e2c",
    "signature": "0xb3bdd1cc76199e5b498b2ead879068da6913f72b597c1d2fd301d03b31fb6b9e7712c73df363785c5d228147135700d831d772f744db7999d0b8fc979390fc481b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}