{
  "manageEntity": {
    "action": "Save",
    "entityId": "1312508519",
    "entityType": "Track",
    "nonce": "0x70d2f198dd9ad4957fbe40c8e5d31af73e3edda7b98c94df676f895168032221",
    "signature": "0xc6fdf67ec98306fbf0b0db1ff7a783596df0d9e663dd41e3eabe870eed790a9b1a42c18217bc592b38cb9ecc254a0a18b279a5009d59e01f18296e722e5f0da91c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}