{
  "manageEntity": {
    "action": "Save",
    "entityId": "51361",
    "entityType": "Track",
    "nonce": "0xdd173e70753699b4e52079bb22dffe62a774e0889ba8ab821462e3a4a0ba755f",
    "signature": "0xe8069e567de320c02e836c57ab25732886c4b28ab041ce9e04c9309b6120d8720f7bfccc4891d429c2b84c3127ba5240203190cd89f514032ce37eea552f26311c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}