{
  "manageEntity": {
    "action": "Save",
    "entityId": "1421262625",
    "entityType": "Track",
    "nonce": "0xb63f20e95ec2438bfb9e8b6544b1f62e01bc73f953071c3233c88b7ce62cdce1",
    "signature": "0xe8d946c9e24ff8a9c38f525ec91b1a11eb9bef64395bb106e901fed438f9a97504373ae1cba1f56f0811f5700a44c2357254b8bc747580d63cd43af6c285c9c31b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}