{
  "manageEntity": {
    "action": "Save",
    "entityId": "39199456",
    "entityType": "Track",
    "nonce": "0xdd89a48c4f008d3c479139038976502af3c4e2aa2eeb373ef412baaae0e3edaf",
    "signature": "0x947405ddc4f5e516a9d55b84292b8cff3b73f8afd68052d081f202173edd883f3f709f168107cd8b3bcdf3294ead7127d851bdca1aae7c443680a7311d60dfc71c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}