{
  "manageEntity": {
    "action": "Save",
    "entityId": "463666360",
    "entityType": "Track",
    "nonce": "0x607bae3da80dcb3e2b27cc8d8b8f66da2a866552b02b2f56933b28176511868a",
    "signature": "0xd8675ce7c3498c483617b6ee82c7e04baf13123baa9b8a1424494ae0f4f078ab0f25e3c57c13adcc45d60eaaf4176f1ddc1be033f94b86dd037107eb4e99be3e1c",
    "signer": "0x92d3aEA782A42D4B044a13a4727af9Aca3a0211F",
    "userId": "12615893"
  }
}