{
  "manageEntity": {
    "action": "Save",
    "entityId": "40203066",
    "entityType": "Track",
    "nonce": "0xbfbebcb5dc6fe6399ec33c2274b3b709eb8bfa0b5c1c3236537ffcf7c2573009",
    "signature": "0x7aee0cdd6224b94ed67be491d616bb023c0989cbc4a13dbbe03d4a9313fb72f470676dcd40bda1afbb7e59af48612d0d88503a0098a02837d5102e5f0be165151c",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}