{
  "manageEntity": {
    "action": "Save",
    "entityId": "535365",
    "entityType": "Track",
    "nonce": "0x85578a3e20f9fe945ce02ea446bb2028b1fb8f87d7a2e7412acf5e87abc4ba00",
    "signature": "0xaef27f20122e9e1b30378811148aebc1e7534c79b69285aad2f425d1f69bcfdb14ae5b3cf9caea7b4665f976c15f8d41893d2542e4872689b0e3985f4b3d41b71b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}