{
  "manageEntity": {
    "action": "Save",
    "entityId": "446777146",
    "entityType": "Track",
    "nonce": "0x30b93c235df9b96358f701cc71d7d07fbeae6e7c024abb3c7de961fbc9e2b027",
    "signature": "0xb15189c35cd17dee945a6ef2dc911f88ab3a6c036a10151d3defc7706231759e2a2a10c5e664cbcbad6ef5d856bd8c27f5f759e44184dab9d3bec697f65643521b",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}