{
  "manageEntity": {
    "action": "Save",
    "entityId": "1922751444",
    "entityType": "Track",
    "nonce": "0x2db361418887f702f7d2f1e7847ef892e303fdf07bd60fc5099d3c4c63bb1d8a",
    "signature": "0x1c29593cb9fc86cc2a3123d188eb8cee3a0d24a25d2d1883510fa28ff0606ff307f196771e8350ade6078915ceff63149f9694b950374d2e59d4515c406726141b",
    "signer": "0x0168976438910D2f5330323a0d0141Fb4Af95032",
    "userId": "317847"
  }
}