{
  "manageEntity": {
    "action": "Save",
    "entityId": "1885238566",
    "entityType": "Track",
    "nonce": "0x122cae4946d6d82e2fdb3b64033d03432d9cede06bde16aa592262eef762cd9d",
    "signature": "0xfd11b18a8f74889b5b989bae3d2bdfc41a4b1cd1adeeb6d5d88b01d400f9ba48704ea9408c6358d76df9c6777438fbcceaa7aa9d9e243cacea458192902c87c71c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}