{
  "manageEntity": {
    "action": "Save",
    "entityId": "964633",
    "entityType": "Track",
    "nonce": "0x2bbf15bce8e02c62258171c74040b5080d7570b66b66aa7775d0b07fed8037d7",
    "signature": "0x36f4c273d13212ea0a69006a22185eca5c7869393ecf092bfb5336952f6055002bd07773f65f3ed07d4add23ea79a4bd2d1b41f0033d0465b6c5c1716dfcba1a1c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}