{
  "manageEntity": {
    "action": "Save",
    "entityId": "1594941580",
    "entityType": "Track",
    "nonce": "0x2962f56c57ba50b3d54efb3b07acd2104ad7719775b55e65e0d40553aa44f1c5",
    "signature": "0xa8b4ef1a30c7f3a63e61d69da1c8525aadf7920a74176d6476ca27825012a5c44f74d5635ab20dcb19d209bead0343ee0226e71bb245adcc686ec596881f1c381c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}