{
  "manageEntity": {
    "action": "Save",
    "entityId": "288135182",
    "entityType": "Track",
    "nonce": "0x27b146291f1e938b95bb125dc7fced51f5ad19dc7f66142cbae0cadba6220c30",
    "signature": "0xb11a4c6403513856220b6aea8866d16bca463efb3fc286137de59078e05ba60520585cb18c4d76379a4e774fed66045cccea21bd104edf013e54a7d5543ad8551c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}