{
  "manageEntity": {
    "action": "Save",
    "entityId": "220302807",
    "entityType": "Track",
    "nonce": "0x9ea1e155b80b37ed2f035c4c70c5feefd47dc26c220b2f53fc4a470f25ddaf1b",
    "signature": "0x05308f7943cace6079312545c2294f3aadaec3a37e5891d9a25b05d6b3d574dc0431cc6a74c0ace9ae6e4b17e2eaf26dc9e6282232721db9bc987cd2ec549f7b1b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}