{
  "manageEntity": {
    "action": "Save",
    "entityId": "476370043",
    "entityType": "Track",
    "nonce": "0x47bbfcb74e518ca7ab23af158dccd0cdcf4a992a72c3230b76de43e568794c32",
    "signature": "0xab3972df56c36a710acc8fc8366a1fc17acac7f938b3828e57d9ccd05d1fad38268d51d034954a3d0b1e0bdc736db44b831dfa88a703a1b4640530c309e808261c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}