{
  "manageEntity": {
    "action": "Save",
    "entityId": "1900768940",
    "entityType": "Track",
    "nonce": "0x2b7cbe6844611183cfd2e45f589b285a0590aaafa5193b42bcda797128dd8677",
    "signature": "0xf4b2f727a765fc5e596b558afc87af872bbf23f0e4b08403ac5776ccbefa51d51be7ead57318156968188a4410c9bafde78f46fbbd62db4c7156af19a04d45dd1b",
    "signer": "0x96818aB6687d2E9bA070EB1d6843ef7BfEF5cDa4",
    "userId": "806873848"
  }
}