{
  "manageEntity": {
    "action": "Save",
    "entityId": "1117890",
    "entityType": "Track",
    "nonce": "0xfab22e8e5d9e48e16435f32699c80bf6c46675c39c09fa0f568483a317e8db6e",
    "signature": "0x6281a60a88e1332e3cf7fedbee59f864cdf56c98e9ca07fd237305a628bd3c1a2cd31aa472dca3ac415fd5ea4b3c502c20a00522bba3082d4169531629ac9d541c",
    "signer": "0xa6537b4A64192585E782889E1230Cb8E13E01fd1",
    "userId": "154253595"
  }
}