{
  "manageEntity": {
    "action": "Save",
    "entityId": "171002586",
    "entityType": "Track",
    "nonce": "0x5cc32756661e43fcc0016eb1e89252241866e9959ecdebf3ed86f869e54f4dcf",
    "signature": "0xa82966e313849e49ce39ba58ad4b13bb58f46d37d811a5fa0837d2884a1fdda44c03574e37761e554ebeeb6530c3cc13b44f5e1b493f019e2b55b8223363088e1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}