{
  "manageEntity": {
    "action": "Save",
    "entityId": "2063715573",
    "entityType": "Track",
    "nonce": "0xce0ecaab93694739b895217b92776d8306f0c4e5f1c725ff902482ebe6599ce9",
    "signature": "0x81ef916e0b33a4c5d214563df9d2271000aa0a66d07f7efb4873e01b09be28ab2576f8abf55f73f8ffa6317e2abc7f84971cda338aa4a9af028e7464bfca1cd11c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}