{
  "manageEntity": {
    "action": "Save",
    "entityId": "54579516",
    "entityType": "Track",
    "nonce": "0xdbf081f2549eacac77fd54adad9c7099aed9276b321c91d2f6ea43d87891841c",
    "signature": "0xb7b6300a7eae64b52c746d9267f9a31ee1398f3fa9d97ac774994a38b3a204044c337fce79798ae93a468505d4cf5bd51ae1a00fe900d06f71472283528f00951c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}