{
  "manageEntity": {
    "action": "Save",
    "entityId": "276680491",
    "entityType": "Track",
    "nonce": "0xf45efeaed8170b13ece6d484e6fc4ba636589a937125d9544c81caf62e8b25fc",
    "signature": "0x9de1bf5171313d5e0c308a2fee2826eb73316f08336592e28e631d64d5f24e234b829836c2f5d49172c8486f2d1716cef1e83c4d38dfc408e21ba7ffdc3fe2231c",
    "signer": "0xc07fCE503240350b65217BbAc77c303Ac8338F90",
    "userId": "512214950"
  }
}