{
  "manageEntity": {
    "action": "Save",
    "entityId": "527552454",
    "entityType": "Track",
    "nonce": "0x3455acc7678270f8053e6a8d67afbe4d166330f7efd927fca9d048dbd5da7f26",
    "signature": "0x99d86827161a78ef075d9e57003d1eb7b0fc60120cae3b53463f2044b6d7432542d77a5cdc2d0c9806b3247c83982eb5ab9d2d647e797cf5e902b469644ef2621c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}