{
  "manageEntity": {
    "action": "Save",
    "entityId": "1544293180",
    "entityType": "Track",
    "nonce": "0x505b0b4f0a6caaafb6838dc49f07cd24db192c7013207acc1d20c6807d4e91ef",
    "signature": "0x45588c4644a50fa1bb77c604d6985fb3b3e521facefa3b47b4b866a33c541c172e88ee0f9494a6f101924336e11428a3aea051d35cc4144a0f0018d5f800a3111c",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}