{
  "manageEntity": {
    "action": "Save",
    "entityId": "1980642047",
    "entityType": "Track",
    "nonce": "0xed5e9554329b03e685ea5288b10b0d835cca614021146f025757746e2d2198a4",
    "signature": "0xd76e765105850ba675ee9ea90c742fdc9fb6b177877839ed2d0d34d973f926c60435b91b6cb1db4148c3adda781d9ec31d2635009aa10d6e477e6722fc1b80961b",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}