{
  "manageEntity": {
    "action": "Save",
    "entityId": "1116783",
    "entityType": "Track",
    "nonce": "0x502c42d9a5092498b21ab8cb805e82b0d73b1535916e2cb37f3a9b1eb9e821dd",
    "signature": "0xb7cbc2ee07782495dce4c2ef393dd1954b475f735357c1bf23580feb56669bf114e933e4968b697af8a700fef75643fd7baaff6a6a00e7662fcd6cca2f0153be1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}