{
  "manageEntity": {
    "action": "Save",
    "entityId": "1788641085",
    "entityType": "Track",
    "nonce": "0x9729bb41688fcb2dfc9d5350f22074d2047911b348d4b0678a33ea1c2deb9474",
    "signature": "0xa086de1d53be22c1557d5fabbd2db9c03fc535251987553cf4b204b66f4f500b6a6e744b87de227b7a1ea38f720799d798dcb526ebf3b68b9775290aa36668bf1c",
    "signer": "0xA66d5981794A5e084FBD9adBFF28F465924fb9a9",
    "userId": "980224167"
  }
}