{
  "manageEntity": {
    "action": "Save",
    "entityId": "271305",
    "entityType": "Track",
    "nonce": "0x4af8f88dd013ec50463e2a65acb34c56323c3369adafe05a3a67cd848c492477",
    "signature": "0x9492c47c24d36cf8e60a596cf6783ca7331a3ef4b7038302864b1c1bb6edd49b3e567f3384ce5f808856c3a41b87fef3e2abaabd12f289e98de400701aad1a301c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}