{
  "manageEntity": {
    "action": "Save",
    "entityId": "2144643730",
    "entityType": "Track",
    "nonce": "0xa2dd71f495b0c494dc614303e246875cd07184c4aae019f2c05fad36ac365a4e",
    "signature": "0x8efbe8e673ad2ff626982f4f017255872e939b1c547baef6fdfb53f480857fa32ac721bc01eb8a5b31ce7784a3f81343ae5b23d5c1009080e489d9cdfb50dd781b",
    "signer": "0xa185Ff45de6FF68eAa1d7ceC338cba250810134c",
    "userId": "54166466"
  }
}