{
  "manageEntity": {
    "action": "Save",
    "entityId": "673429589",
    "entityType": "Track",
    "nonce": "1790162291078518054",
    "signature": "0x01983a2ce091725f0ca2b2edaa266e2f01a256752fd5f5cb20b993ca003780a27c6ebfef5e9886b00f7710b4aa62d6cf527f333e59577d7c48ef2be31faf59741c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}