{
  "manageEntity": {
    "action": "Save",
    "entityId": "252519522",
    "entityType": "Track",
    "nonce": "0x5befbe4ed8ddf9f6b9af0db0f999d878330c0880a1dec92b952f3c70266bf731",
    "signature": "0x7ec729b5d0273ef795122da26c5539ff59985035a11e587059b1fd65184ef6222883ab969b70593a2ac0a038a63102360ca3a4c9eb410d525cda96d5c0d975a01c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}