{
  "manageEntity": {
    "action": "Save",
    "entityId": "112456644",
    "entityType": "Track",
    "nonce": "0x28dbe13645cc4ed4f567dc0be65dce12d50f935b33b294b63054e344c1715ba9",
    "signature": "0xfbd46e3d64899ab0bf195db3783d12e628c3acef59b542c9b691551984c20ede7a97fac4a78820437f07b66e6d28972ef48e957cdab33f2dec3f8a99d130ee431b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}