{
  "manageEntity": {
    "action": "Save",
    "entityId": "1530917900",
    "entityType": "Track",
    "nonce": "0xc2489dac35fdfbf44982a355590e866c3d5d4d1e429aa28f4303b34ef2546eb6",
    "signature": "0x5fe369ef240f477f97bc2270629c13d12e2ee468976335079335dc052e63b6156600edcc8cec24e78f2f1e83ff232f4bba348c464ab45822400eacb1ad4bf30c1b",
    "signer": "0x19EDB4c1a8740c323f6e57B80F3422C01875289e",
    "userId": "390804"
  }
}