{
  "manageEntity": {
    "action": "Save",
    "entityId": "591588100",
    "entityType": "Track",
    "nonce": "0x04f9fac2e1f0cfd2bc0c1e649b252165e58d6bb6c30f8ab55a51df4e9660a0d7",
    "signature": "0xd8db5b28fc42db72b9b7a53f6b2d6d40d66b69385f74424ac764cddf7d86d7bd665490132fda9f875b76c4b2f6c14e030eadc61a6c69a9243e01616ac91d198a1b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}