{
  "manageEntity": {
    "action": "Save",
    "entityId": "1302451508",
    "entityType": "Track",
    "nonce": "0x4209fe30f5faf23432a0e7c07dcb5704ae8dc9f2d19b58efa6d5fe74bf5a406c",
    "signature": "0xa2a84550e7b44d64028e4db71cb7d33d89bdb1fbcabfd7068ea1166ae75509166bbdec4a903370864daf8c94684d5c223d7b2985fcbfe9f3bcbebdf649e998e11c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}