{
  "manageEntity": {
    "action": "Save",
    "entityId": "71681840",
    "entityType": "Track",
    "nonce": "0x1ecd79081d5460c15f52bdfd05664cd516902a527cd34897a8b24fcdf2df3a79",
    "signature": "0x810e17616aaf936050763a24dc94442d521da86856be4b21ad018942304c4e0c181ab42ddf2c79d919f668a1445151f864a17da8f6f035f5c2d99fb9fe4656b71c",
    "signer": "0x7Cd44Dc53B13eEA7335A000Ce36c05cDFE34b348",
    "userId": "355113"
  }
}