{
  "manageEntity": {
    "action": "Save",
    "entityId": "291333079",
    "entityType": "Track",
    "nonce": "0xaa95744e068142fce3ce447b3f4bfcfc8126cc1b61f84c479afc98fe17ab9905",
    "signature": "0x64815a4480353d02a21d85f8e7796ecaff730b887bb3959f3cc946c2eabd6e3975fc335410e11104b6a38a42a780a7c280fe5478fe543dd3170ff7add98696ae1c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}