{
  "manageEntity": {
    "action": "Save",
    "entityId": "238860948",
    "entityType": "Track",
    "nonce": "0x6c2ba71ee5defdf2673458543647eaafd384e5b2a28ae314d6b852f9d5bd7498",
    "signature": "0x2a63caee60c90b103daa0bf867f08a58c3cc6853de5e3eb762876dc137b3dc3b747e5a5f57079f6bcb27fa6399cc80efa2a97292adda1abd801b8a9e68bf1d781c",
    "signer": "0x4F8e40E75E675f5be20520c4cEA0CbD7bBb999B1",
    "userId": "991796067"
  }
}