{
  "manageEntity": {
    "action": "Save",
    "entityId": "954461",
    "entityType": "Track",
    "nonce": "0xa8bf4442aa0b99689c9d2aa5e74eaa6783d29d92baceb9329f46a44f9531c99d",
    "signature": "0x1decdc9737498aabd12a63a86ede1ec34a17a44efc51f595e3fd10d26fc439e122fce23bbe3c5b87b2af276ea92f7d561dc581452f60ecbd5342bceb7ac6ead91b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}