{
  "manageEntity": {
    "action": "Save",
    "entityId": "156161473",
    "entityType": "Track",
    "nonce": "0x141b9a99a6bfe01332da9264dd68f870d4a1b8180a46d6dc6582ed1040ac6612",
    "signature": "0xa53ab8e56be057579ab7035353dcd3f8dd7414806f532f11061ca2eb7d9e66e82f56cd02c24a1b049a941445b7088207530f3c99a528b5262580222d8f3544e81c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}