{
  "manageEntity": {
    "action": "Save",
    "entityId": "1989286448",
    "entityType": "Track",
    "nonce": "0xd0724f5984558888fc2efb1a5383a86b33f9448f48f418992809b63aab6cdcf6",
    "signature": "0xe0ddc6c6cc441faa5f56473e3344b160184da96e16952d0287a7b6abe09bec252cf73780492306dabe580da35a1cab474d4efc890a610dae953f1cf8f78514521c",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}