{
  "manageEntity": {
    "action": "Save",
    "entityId": "1232254335",
    "entityType": "Track",
    "nonce": "0xfe10adab988af4b16cc7f822fe8bf032a45a427b1a2b6f554b8a89c1a96fc214",
    "signature": "0x22a7b9d8a9dc00a723c6714d6abc4e05e1cf8d893dd25489775f65e5c77123be085e8bc90cf5ae02d78fda1b378f51d41467da1958df4922b104510e11d556c51b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}