{
  "manageEntity": {
    "action": "Save",
    "entityId": "1229068752",
    "entityType": "Track",
    "nonce": "0xecbe5cd563bd5a6020f39513e5c4879b1bd0359ee8704a6d7369b36dcfb47734",
    "signature": "0xc76923a3a4085e26e90206ddfff1499bf195a12337ab7a1374ee6b739a93a7985d1941be8c41186dd6f5a2fc9e0d5320808eff65034ec2a55488c8f87569015b1c",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}