{
  "manageEntity": {
    "action": "Save",
    "entityId": "830808844",
    "entityType": "Track",
    "nonce": "0xfb6779de05a006b65fc7fa3da7dc5f94a3ebb2719e22e40cc2988c786d29c9d3",
    "signature": "0xa1e882098e8431677771b8a5cbdee537876c0ad845037b1d5c029f12278ff5e7423de8ba7ee576184b4706a6255ba153b271f3ca6bf19473f246171aa2a0184a1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}