{
  "manageEntity": {
    "action": "Save",
    "entityId": "1758892984",
    "entityType": "Track",
    "nonce": "0xa33de93df7038bd7861db674e1f80c477ca4deeed05d71f3cff67fe5b0c1721d",
    "signature": "0xb0cc0069b749768778681c109af703b6dae9ffc687353a3f4c9ffc69cf8094b34eff88462e6327eb865e0eca7385c4f873d5878f14ff18642590ef0d341578af1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}