{
  "manageEntity": {
    "action": "Save",
    "entityId": "1251113632",
    "entityType": "Track",
    "nonce": "0x982bd40bcd0babb5fd221850aa2a0aee47495b27054a237328db769dc91a6a39",
    "signature": "0xc302b2f3e77dd9f3e4f25dcc3261fdea14f9726f194ee87290b00203a15318af661c84db1b7bffdf9cb1f0d21fe483710d9c7cb58d4087433f8227c555462a4a1b",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}