{
  "manageEntity": {
    "action": "Save",
    "entityId": "254719856",
    "entityType": "Track",
    "nonce": "1785604124385946075",
    "signature": "0xa174a0b9523f32ecc2dc80979d331f7052ca18cda8f31563996223fcb19e4a9732d8ab9e1e09151507284b8e0b5565782630a1b975ace02573891442cce9a2861b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}