{
  "manageEntity": {
    "action": "Save",
    "entityId": "243505191",
    "entityType": "Track",
    "nonce": "0x15c5153e4d212d7bc1d7721bcd530a73154e92343fb9d755ce4de9bd84bc4ee6",
    "signature": "0x62d6e3baed9e938e6115c3629645c0d79905fba9905641888fb4595981f32d827980f1a0fb6cf68cfafb1a29e4d2f4a0aa4b22a5bf5842df674c95670e2743a71c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}